speex编译
2024-10-21 11:26:32
首先去官网
https://www.speex.org/downloads/
下载解压
将include、libspeex文件夹复制到自己新建工程的jni目录下
speex有关的类
package com.speex.lib; public class Speex { /* quality
* 1 : 4kbps (very noticeable artifacts, usually intelligible)
* 2 : 6kbps (very noticeable artifacts, good intelligibility)
* 4 : 8kbps (noticeable artifacts sometimes)
* 6 : 11kpbs (artifacts usually only noticeable with headphones)
* 8 : 15kbps (artifacts not usually noticeable)
*/
private static final int DEFAULT_COMPRESSION = 4; public Speex() {
} public void init() {
load();
open(DEFAULT_COMPRESSION);
} private void load() {
try {
System.loadLibrary("speex");
} catch (Throwable e) {
e.printStackTrace();
} } public native int open(int compression);
public native int getFrameSize();
public native int decode(byte encoded[], short lin[], int size);
public native int encode(short lin[], int offset, byte encoded[], int size);
public native void close(); }
对应的C的源码speex_jni.cpp的源码
//// #include <jni.h> #include <string.h>
#include <unistd.h> #include <speex/speex.h> static int codec_open = ; static int dec_frame_size;
static int enc_frame_size; static SpeexBits ebits, dbits;
void *enc_state;
void *dec_state; static JavaVM *gJavaVM; extern "C"
JNIEXPORT jint JNICALL Java_com_speex_lib_Speex_open
(JNIEnv *env, jobject obj, jint compression) {
int tmp; if (codec_open++ != )
return (jint); speex_bits_init(&ebits);
speex_bits_init(&dbits); enc_state = speex_encoder_init(&speex_nb_mode);
dec_state = speex_decoder_init(&speex_nb_mode);
tmp = compression;
speex_encoder_ctl(enc_state, SPEEX_SET_QUALITY, &tmp);
speex_encoder_ctl(enc_state, SPEEX_GET_FRAME_SIZE, &enc_frame_size);
speex_decoder_ctl(dec_state, SPEEX_GET_FRAME_SIZE, &dec_frame_size); return (jint);
} extern "C"
JNIEXPORT jint JNICALL Java_com_speex_lib_Speex_encode
(JNIEnv *env, jobject obj, jshortArray lin, jint offset, jbyteArray encoded, jint size) { jshort buffer[enc_frame_size];
jbyte output_buffer[enc_frame_size];
int nsamples = (size-)/enc_frame_size + ;
int i, tot_bytes = ; if (!codec_open)
return ; speex_bits_reset(&ebits); for (i = ; i < nsamples; i++) {
env->GetShortArrayRegion(lin, offset + i*enc_frame_size, enc_frame_size, buffer);
speex_encode_int(enc_state, buffer, &ebits);
} tot_bytes = speex_bits_write(&ebits, (char *)output_buffer,
enc_frame_size);
env->SetByteArrayRegion(encoded, , tot_bytes,
output_buffer); return (jint)tot_bytes;
} extern "C"
JNIEXPORT jint JNICALL Java_com_speex_lib_Speex_decode
(JNIEnv *env, jobject obj, jbyteArray encoded, jshortArray lin, jint size) { jbyte buffer[dec_frame_size];
jshort output_buffer[dec_frame_size];
jsize encoded_length = size; if (!codec_open)
return ; env->GetByteArrayRegion(encoded, , encoded_length, buffer);
speex_bits_read_from(&dbits, (char *)buffer, encoded_length);
speex_decode_int(dec_state, &dbits, output_buffer);
env->SetShortArrayRegion(lin, , dec_frame_size,
output_buffer); return (jint)dec_frame_size;
} extern "C"
JNIEXPORT jint JNICALL Java_com_speex_lib_Speex_getFrameSize
(JNIEnv *env, jobject obj) { if (!codec_open)
return ;
return (jint)enc_frame_size; } extern "C"
JNIEXPORT void JNICALL Java_com_speex_lib_Speex_close
(JNIEnv *env, jobject obj) { if (--codec_open != )
return; speex_bits_destroy(&ebits);
speex_bits_destroy(&dbits);
speex_decoder_destroy(dec_state);
speex_encoder_destroy(enc_state);
}
在jni目录下新增Android.mk文件,复制如下内容,Android.mk中记录了待编译的源文件的路
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := libspeex
LOCAL_CFLAGS = -DFIXED_POINT -DUSE_KISS_FFT -DEXPORT="" -UHAVE_CONFIG_H
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include #LOCAL_SRC_FILES :=
LOCAL_SRC_FILES :=speex_jni.cpp \
./libspeex/bits.c \
./libspeex/cb_search.c \
./libspeex/exc_10_16_table.c \
./libspeex/exc_10_32_table.c \
./libspeex/exc_20_32_table.c \
./libspeex/exc_5_256_table.c \
./libspeex/exc_5_64_table.c \
./libspeex/exc_8_128_table.c \
./libspeex/filters.c \
./libspeex/gain_table_lbr.c \
./libspeex/gain_table.c \
./libspeex/hexc_10_32_table.c \
./libspeex/hexc_table.c \
./libspeex/high_lsp_tables.c \
./libspeex/kiss_fft.c \
./libspeex/kiss_fftr.c \
./libspeex/lpc.c \
./libspeex/lsp_tables_nb.c \
./libspeex/lsp.c \
./libspeex/ltp.c \
./libspeex/modes_wb.c \
./libspeex/modes.c \
./libspeex/nb_celp.c \
./libspeex/quant_lsp.c \
./libspeex/sb_celp.c \
./libspeex/smallft.c \
./libspeex/speex_callbacks.c \
./libspeex/speex_header.c \
./libspeex/speex.c \
./libspeex/stereo.c \
./libspeex/vbr.c \
./libspeex/vorbis_psy.c \
./libspeex/vq.c \
./libspeex/window.c \ include $(BUILD_SHARED_LIBRARY)
在jni下创建Application.mk,并添加如下内容,编译所有平台下的so文件
APP_ABI := all
在jni/include/speex/目录下新增speex_config_types.h文件,复制内容如下
#ifndef __SPEEX_TYPES_H__
#define __SPEEX_TYPES_H__ typedef short spx_int16_t;
typedef unsigned short spx_uint16_t;
typedef int spx_int32_t;
typedef unsigned int spx_uint32_t; #endif
在命令行输入ndk-build
开始编译
在libs目录下面生成
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